Sleep gummies: what is inside and what the evidence says
Sleep gummies often use melatonin, magnesium or herbs. Here is what the evidence says for each one, why labels get the dose wrong, and how to keep gummies away from kids.
Quick answer
Sleep gummies often use melatonin, magnesium or herbs like valerian and chamomile. NCCIH, the NIH center for complementary health, says melatonin may help with jet lag. It says there is not enough strong evidence to recommend melatonin for chronic insomnia.
Labels are often off. In a 2023 study, 22 of 25 melatonin gummies did not contain the amount on the label. For insomnia that lasts, the American College of Physicians recommends cognitive behavioral therapy for insomnia (CBT-I) first.
What is inside a sleep gummy
Here are four ingredients you will often see on sleep gummy labels, and what NIH sources say about each one.
| Ingredient | Evidence for sleep | Main watch-out |
|---|---|---|
| Melatonin | May help jet lag. Weak for chronic insomnia. | Doses on labels are often wrong |
| Valerian | Inconsistent | Do not mix with alcohol or sedatives |
| Chamomile | Very little | Allergy risk |
| Magnesium | Not covered in the NIH consumer fact sheet | More than 350 mg a day from supplements can cause diarrhea |
Melatonin: what to know
Melatonin is a hormone your brain makes in response to darkness. Supplements are most often made in a lab.
It may help with jet lag. In four studies of 142 travelers flying east, melatonin may have eased jet lag symptoms more than a placebo, according to NCCIH.
For chronic insomnia, NCCIH says there is not enough strong evidence on how well melatonin works or how safe it is to recommend it.
Short-term use appears to be safe for most people. Long-term safety is not known. The side effects reported in short studies were mild: headache, dizziness, nausea and sleepiness.
Labels often get the dose wrong
In a 2023 study, 22 of 25 melatonin gummy products were labeled wrong. One had no melatonin the researchers could detect. In the others, melatonin ranged from 74 to 347 percent of the label amount (NCCIH).
An earlier study tested 31 melatonin supplements in 2017. Most did not match their labels, and 26 percent contained serotonin, a hormone that can be harmful even at low levels.
A seal from USP, NSF or ConsumerLab can help. The NIH says these seals mean a product was properly made and contains what the label lists. They do not prove a product is safe or that it works.
Other common ingredients
Valerian
NCCIH says the evidence on valerian for sleep is inconsistent. The American Academy of Sleep Medicine recommends against it for chronic insomnia in adults. It seems safe for short-term use in most adults. Side effects can include headache, upset stomach and vivid dreams. Do not take it with alcohol or sedatives.
Chamomile
NCCIH says there is very little information on chamomile and insomnia. A 2019 review found one insomnia study, and it showed no benefit. Chamomile is likely safe in the amounts found in tea. People who are allergic to ragweed, chrysanthemums, marigolds or daisies are more likely to react to it.
Magnesium
The NIH consumer fact sheet on magnesium does not mention sleep. It does set an upper limit of 350 mg a day from supplements for adults and kids 9 and older. More than that can cause diarrhea, nausea and cramping.
Keep sleep gummies away from kids
Gummies look like candy, and kids find them. Poison control reports of melatonin ingestion in people 19 and younger rose from 8,337 in 2012 to 52,563 in 2021. Most of those calls (94.3 percent) were for children 5 and younger who swallowed melatonin at home (NCCIH).
Most of those children (82.8 percent) had no symptoms. Over the 10 years, 4,097 people were hospitalized and 287 needed intensive care.
A 2024 CDC report estimated about 11,000 emergency room visits from 2019 to 2022 for unsupervised melatonin ingestion by children 5 and younger.
Store sleep gummies up high and out of sight. Ask your child’s doctor before you give a child melatonin. NCCIH says there is a lot we don’t know about melatonin use in children.
What to try first for insomnia
If sleep trouble lasts for months, a supplement is not the first step. The American College of Physicians strongly recommends cognitive behavioral therapy for insomnia (CBT-I) as the first treatment, according to NCCIH. Ask your doctor where to find it.
See a doctor if poor sleep lasts for weeks, or if you feel sleepy during the day even after a full night in bed.
FAQ
Do sleep gummies work?
It depends on the ingredient. NCCIH says melatonin may help with jet lag, but the evidence for chronic insomnia is weak. The evidence for valerian is inconsistent, and there is very little on chamomile.
Is it safe to take melatonin every night?
Short-term use appears safe for most people, according to NCCIH. Long-term safety is not known, so talk to your doctor if you need it for more than a short time.
Can kids take melatonin gummies?
Ask your child’s doctor first. NCCIH says there is a lot we don’t know about melatonin in children, and accidental melatonin ingestions in kids have climbed sharply.
Why do some sleep gummies leave me groggy?
The dose may be one reason. In a 2023 study, most melatonin gummies had 1.2 to 1.7 times more melatonin than the label said. Sleepiness is also a listed side effect.
Can I take valerian with alcohol?
No. NCCIH says valerian should not be taken with alcohol or sedatives.
Sources
- NCCIH: Melatonin: What You Need To Know
- NCCIH: Valerian
- NCCIH: Chamomile
- NIH Office of Dietary Supplements: Magnesium fact sheet for consumers
- NIH Office of Dietary Supplements: Dietary Supplements: What You Need To Know
This page is general information, not medical advice. Check with a doctor before you start a new supplement. Medical disclaimer